Used to vs be/get used to

Used to + infinitive – refers to past habits which are no longer true.

Be used to or get used to + gerund – refer to something you have become accustomed to (past, present or future).

Ex: In the 1950’s computers used to be big and heavy. Meanwhile we got used to carrying around our light-weight laptops, tablets or even smart phones. Soon we will get used to havingour computers in our wristwatches or in our glasses.

As used to is a phrase in the past, we have to use “did” and “didn’t” as auxiliares in the interrogative and negative sentences.

Ex: When I was a child, I didn’t useto have a computer in my room. Did you use to have one?

As for be or get used to, it depends on the verb and verb tense you are using. Look:

My mother isn’t used tomaking phone calls on her new smart phone. She didn’t get used to it. (Past)

– Will she get used to her flip phone? (Future)

She will not get used to it. She is used to her old mobile. (Future/Present)